/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.tsfile.read.filter.operator;

import org.apache.iotdb.tsfile.file.metadata.statistics.Statistics;
import org.apache.iotdb.tsfile.read.common.TimeRange;
import org.apache.iotdb.tsfile.read.filter.basic.Filter;
import org.apache.iotdb.tsfile.read.filter.factory.FilterFactory;
import org.apache.iotdb.tsfile.read.filter.factory.FilterSerializeId;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/**
 * NotFilter necessary. Use InvertExpressionVisitor
 */
public class NotFilter implements Filter, Serializable {

    private static final long serialVersionUID = 584860326604020881L;
    private Filter that;

    public NotFilter() {
    }

    public NotFilter(Filter that) {
        this.that = that;
    }

    @Override
    public boolean satisfy(Statistics statistics) {
        return !that.satisfy(statistics);
    }

    @Override
    public boolean satisfy(long time, Object value) {
        return !that.satisfy(time, value);
    }

    /**
     * Notice that, if the not filter only contains value filter, this method may return false, this
     * may cause misunderstanding.
     */
    @Override
    public boolean satisfyStartEndTime(long startTime, long endTime) {
        return !that.satisfyStartEndTime(startTime, endTime);
    }

    @Override
    public boolean containStartEndTime(long startTime, long endTime) {
        return !that.satisfyStartEndTime(startTime, endTime);
    }

    @Override
    public Filter copy() {
        return new NotFilter(that.copy());
    }

    public Filter getFilter() {
        return this.that;
    }

    @Override
    public String toString() {
        return "NotFilter: " + that;
    }

    @Override
    public void serialize(DataOutputStream outputStream) {
        try {
            outputStream.write(getSerializeId().ordinal());
            that.serialize(outputStream);
        } catch (IOException ignored) {
            // ignored
        }
    }

    @Override
    public void deserialize(ByteBuffer buffer) {
        that = FilterFactory.deserialize(buffer);
    }

    @Override
    public FilterSerializeId getSerializeId() {
        return FilterSerializeId.NOT;
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof NotFilter)) {
            return false;
        }
        NotFilter other = ((NotFilter) obj);
        return this.that.equals(other.that);
    }

    @Override
    public int hashCode() {
        return Objects.hash(that);
    }

    @Override
    public List<TimeRange> getTimeRanges() {
        List<TimeRange> list = that.getTimeRanges();
        if (list.isEmpty()) {
            return list;
        }
        List<TimeRange> res = new ArrayList<>();
        if (list.get(0).getMin() != Long.MIN_VALUE) {
            res.add(new TimeRange(Long.MIN_VALUE, list.get(0).getMin() - 1));
        }
        for (int i = 1, size = list.size(); i < size; i++) {
            long left = list.get(i - 1).getMax() + 1;
            long right = list.get(i).getMin() - 1;
            if (left <= right) {
                res.add(new TimeRange(left, right));
            }
        }

        if (list.get(list.size() - 1).getMax() != Long.MAX_VALUE) {
            res.add(new TimeRange(list.get(list.size() - 1).getMax() + 1, Long.MAX_VALUE));
        }
        return res;
    }
}
